AZMET offers two types of comma delimited (ASCII format) data files: Hourly and Daily.
These raw data files can be loaded into spreadsheets
and databases such as Excel and Access, etc.
The raw files can also be read by advanced programming languages.
In all raw data files, the units of measurement are Metric.

In an effort to improve our service, we have made major changes
to the format of our raw data files from 2003 to present.
Both the Raw Hourly and Raw Daily files are altered.

All data for 2003 has been reprocessed and put into these new formats.
(Raw data files from 2002 and earlier, are still in the old original format.
Although, we are considering reworking past years into the new format.)

The Raw Hourly data has two new values added to the end of each line of data:
Actual Vapor Pressure (hourly average) at data point position 17
Dewpoint (hourly average) at data point position 18
The hourly integrated heat unit value which was at data point position 17
will be removed due to lack of use. The more widely accepted sine curve heat unit
value can still be found in the raw daily data.
Each hourly line will have a total of 18 values.

The Raw Daily data has three new values added to the end of each line of data:
Reference Evapotranspiration (ETo) by Penman-Monteith equation, at data point position 26
Actual Vapor Pressure (daily mean at data point position 27
Dewpoint (daily mean) at data point position 28
Also note that the positions of the original AZMET ETo and heat unit values
have been transposed from the order of previous years.
Each daily line will have a total of 28 values.

AZMET weather stations record and store data in metric units.
The data contained in our Raw Hourly and Daily files is in metric units.
The word 'English' here does not refer to the language.
'English' units are those units of measurements which were standardized
and used throughout Great Britain.